
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkComposeShader.h"
#include "Sk1DPathEffect.h"
#include "SkCornerPathEffect.h"
#include "SkPathMeasure.h"
#include "SkRandom.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkLayerRasterizer.h"

#include "SkParsePath.h"
static void testparse()
    {
    SkRect r;
    r.set(0, 0, SkFloatToScalar(10), SkFloatToScalar(10.5));
    SkPath p, p2;
    SkString str, str2;

    p.addRect(r);
    SkParsePath::ToSVGString(p, &str);
    SkParsePath::FromSVGString(str.c_str(), &p2);
    SkParsePath::ToSVGString(p2, &str2);
    }

class ArcsView : public SampleView
    {
    public:
        ArcsView()
            {
            testparse();
            fSweep = SkIntToScalar(100);
            this->setBGColor(0xFFDDDDDD);
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "Arcs");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        static void drawRectWithLines(SkCanvas* canvas, const SkRect& r, const SkPaint& p)
            {
            canvas->drawRect(r, p);
            canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p);
            canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p);
            canvas->drawLine(r.fLeft, r.centerY(), r.fRight, r.centerY(), p);
            canvas->drawLine(r.centerX(), r.fTop, r.centerX(), r.fBottom, p);
            }

        static void draw_label(SkCanvas* canvas, const SkRect& rect,
                               int start, int sweep)
            {
            SkPaint paint;

            paint.setAntiAlias(true);
            paint.setTextAlign(SkPaint::kCenter_Align);

            SkString    str;

            str.appendS32(start);
            str.append(", ");
            str.appendS32(sweep);
            canvas->drawText(str.c_str(), str.size(), rect.centerX(),
                             rect.fBottom + paint.getTextSize() * 5/4, paint);
            }

        static void drawArcs(SkCanvas* canvas)
            {
            SkPaint paint;
            SkRect  r;
            SkScalar w = SkIntToScalar(75);
            SkScalar h = SkIntToScalar(50);

            r.set(0, 0, w, h);
            paint.setAntiAlias(true);
            paint.setStyle(SkPaint::kStroke_Style);

            canvas->save();
            canvas->translate(SkIntToScalar(10), SkIntToScalar(300));

            paint.setStrokeWidth(SkIntToScalar(1));

            static const int gAngles[] =
                {
                0, 360,
                0, 45,
                0, -45,
                720, 135,
                -90, 269,
                -90, 270,
                -90, 271,
                -180, -270,
                225, 90
                };

            for (size_t i = 0; i < SK_ARRAY_COUNT(gAngles); i += 2)
                {
                paint.setColor(SK_ColorBLACK);
                drawRectWithLines(canvas, r, paint);

                paint.setColor(SK_ColorRED);
                canvas->drawArc(r, SkIntToScalar(gAngles[i]),
                                SkIntToScalar(gAngles[i+1]), false, paint);

                draw_label(canvas, r, gAngles[i], gAngles[i+1]);

                canvas->translate(w * 8 / 7, 0);
                }

            canvas->restore();
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            fSweep = SampleCode::GetAnimScalar(SkIntToScalar(360)/24,
                                               SkIntToScalar(360));
//        fSweep = SkFloatToScalar(359.99f);

            SkRect  r;
            SkPaint paint;

            paint.setAntiAlias(true);
            paint.setStrokeWidth(SkIntToScalar(2));
            paint.setStyle(SkPaint::kStroke_Style);

            r.set(0, 0, SkIntToScalar(200), SkIntToScalar(200));
            r.offset(SkIntToScalar(20), SkIntToScalar(20));

            if (false)
                {
                const SkScalar d = SkIntToScalar(3);
                const SkScalar rad[] = { d, d, d, d, d, d, d, d };
                SkPath path;
                path.addRoundRect(r, rad);
                canvas->drawPath(path, paint);
                return;
                }

            drawRectWithLines(canvas, r, paint);

            //     printf("----- sweep %g %X\n", SkScalarToFloat(fSweep), SkDegreesToRadians(fSweep));


            paint.setStyle(SkPaint::kFill_Style);
            paint.setColor(0x800000FF);
            canvas->drawArc(r, 0, fSweep, true, paint);

            paint.setColor(0x800FF000);
            canvas->drawArc(r, 0, fSweep, false, paint);

            paint.setStyle(SkPaint::kStroke_Style);
            paint.setColor(SK_ColorRED);
            canvas->drawArc(r, 0, fSweep, true, paint);

            paint.setStrokeWidth(0);
            paint.setColor(SK_ColorBLUE);
            canvas->drawArc(r, 0, fSweep, false, paint);

            drawArcs(canvas);
            this->inval(NULL);
            }

        virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y)
            {
            //   fSweep += SK_Scalar1;
            this->inval(NULL);
            return this->INHERITED::onFindClickHandler(x, y);
            }

        virtual bool onClick(Click* click)
            {
            return this->INHERITED::onClick(click);
            }

    private:
        SkScalar fSweep;

        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new ArcsView;
    }
static SkViewRegister reg(MyFactory);

